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Make fread() more consistent with glibc

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This commit is contained in:
Justine Tunney 2024-08-17 02:57:22 -07:00
parent 1d532ba3f8
commit 8e14b27749
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GPG key ID: BE714B4575D6E328
3 changed files with 57 additions and 24 deletions
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4
test/libc/stdio/fputc_test.c
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@ -33,9 +33,13 @@ void SetUpOnce(void) {
TEST(fputc, test) {
ASSERT_NE(NULL, (f = fopen("hog", "w+")));
EXPECT_EQ('h', fputc('h', f));
EXPECT_FALSE(feof(f));
EXPECT_EQ(0xFF, fputc(-1, f));
EXPECT_FALSE(feof(f));
EXPECT_NE(-1, fseek(f, 0, SEEK_SET));
EXPECT_FALSE(feof(f));
EXPECT_EQ('h', fgetc(f));
EXPECT_FALSE(feof(f));
EXPECT_EQ(0, fread(NULL, 0, 0, f));
EXPECT_FALSE(feof(f));
EXPECT_EQ(0xFF, fgetc(f));

31
test/libc/stdio/fread_test.c
View file

@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/errno.h"
#include "libc/stdio/stdio.h"
#include "libc/testlib/testlib.h"
@ -45,7 +46,7 @@ TEST(fread, eofIsSticky) {
}
TEST(fread, seekWithBuffer) {
FILE *f;
FILE* f;
char b[8] = "hellosup";
char c[8] = {0};
char d[8] = {0};
@ -60,3 +61,31 @@ TEST(fread, seekWithBuffer) {
ASSERT_STREQ("ellos", d);
ASSERT_EQ(0, fclose(f));
}
TEST(fread, zero) {
FILE* f;
char buf[8] = {0};
ASSERT_NE(NULL, (f = fopen("foo", "w")));
ASSERT_EQ(2, fwrite("hi", 1, 2, f));
ASSERT_EQ(0, fclose(f));
ASSERT_NE(NULL, (f = fopen("foo", "r")));
ASSERT_EQ(0, fread(buf, 0, 0, f));
ASSERT_EQ(0, ferror(stdin));
ASSERT_EQ(0, feof(stdin));
ASSERT_STREQ("", buf);
ASSERT_EQ(0, fclose(f));
}
TEST(fread, partial) {
FILE* f;
char buf[8] = {0};
ASSERT_NE(NULL, (f = fopen("foo", "w")));
ASSERT_EQ(2, fwrite("hi", 1, 2, f));
ASSERT_EQ(0, fclose(f));
ASSERT_NE(NULL, (f = fopen("foo", "r")));
ASSERT_EQ(0, fread(buf, 8, 1, f));
ASSERT_EQ(0, ferror(stdin));
ASSERT_EQ(0, feof(stdin));
ASSERT_EQ(0, fclose(f));
ASSERT_STREQ("hi", buf);
}